[x86] add tests for convert-FP-to-integer with constants; NFC

We don't constant fold any of these, but we could...but if we
do, we must produce the right answer.

Unlike the IR fptosi instruction or its DAG node counterpart
ISD::FP_TO_SINT, these are not undef for an out-of-range input.

llvm-svn: 329100

diff --git a/llvm/test/CodeGen/X86/fptosi-constant.ll b/llvm/test/CodeGen/X86/fptosi-constant.ll
new file mode 100644 (file)
index 0000000..7baeff3
--- /dev/null
+++ b/llvm/test/CodeGen/X86/fptosi-constant.ll
@@ -0,0 +1,133 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
+
+; Check constant FP to signed integer conversions that overflow the integer type.
+
+define i32 @constant_v2f64_to_i32() {
+; CHECK-LABEL: constant_v2f64_to_i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvtsd2si {{.*}}(%rip), %eax
+; CHECK-NEXT:    retq
+  %r = call i32 @llvm.x86.sse2.cvtsd2si(<2 x double> <double 5.0e+09, double undef>)
+  ret i32 %r
+}
+
+define i32 @constant_v2f64_to_i32_round_to_zero() {
+; CHECK-LABEL: constant_v2f64_to_i32_round_to_zero:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvttsd2si {{.*}}(%rip), %eax
+; CHECK-NEXT:    retq
+  %r = call i32 @llvm.x86.sse2.cvttsd2si(<2 x double> <double 5.0e+09, double undef>)
+  ret i32 %r
+}
+
+define i64 @constant_v2f64_to_i64() {
+; CHECK-LABEL: constant_v2f64_to_i64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvtsd2si {{.*}}(%rip), %rax
+; CHECK-NEXT:    retq
+  %r = call i64 @llvm.x86.sse2.cvtsd2si64(<2 x double> <double 5.0e+19, double undef>)
+  ret i64 %r
+}
+
+define i64 @constant_v2f64_to_i64_round_to_zero() {
+; CHECK-LABEL: constant_v2f64_to_i64_round_to_zero:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvttsd2si {{.*}}(%rip), %rax
+; CHECK-NEXT:    retq
+  %r = call i64 @llvm.x86.sse2.cvttsd2si64(<2 x double> <double 5.0e+19, double undef>)
+  ret i64 %r
+}
+
+define <4 x i32> @constant_v2f64_to_v4i32() {
+; CHECK-LABEL: constant_v2f64_to_v4i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvtpd2dq {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %r = call <4 x i32> @llvm.x86.sse2.cvtpd2dq(<2 x double> <double 5.0e+09, double 5.0e+09>)
+  ret <4 x i32> %r
+}
+
+define <4 x i32> @constant_v2f64_to_v4i32_round_to_zero() {
+; CHECK-LABEL: constant_v2f64_to_v4i32_round_to_zero:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvttpd2dq {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %r = call <4 x i32> @llvm.x86.sse2.cvttpd2dq(<2 x double> <double 5.0e+09, double 5.0e+09>)
+  ret <4 x i32> %r
+}
+
+define i32 @constant_v4f32_to_i32() {
+; CHECK-LABEL: constant_v4f32_to_i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvtss2si {{.*}}(%rip), %eax
+; CHECK-NEXT:    retq
+  %r = call i32 @llvm.x86.sse.cvtss2si(<4 x float> <float 5.0e+09, float undef, float undef, float undef>)
+  ret i32 %r
+}
+
+define i32 @constant_v4f32_to_i32_round_to_zero() {
+; CHECK-LABEL: constant_v4f32_to_i32_round_to_zero:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvttss2si {{.*}}(%rip), %eax
+; CHECK-NEXT:    retq
+  %r = call i32 @llvm.x86.sse.cvttss2si(<4 x float> <float 5.0e+09, float undef, float undef, float undef>)
+  ret i32 %r
+}
+
+; 9223372036854775808.0 = 0x8000000000000000
+
+define i64 @constant_v4f32_to_i64() {
+; CHECK-LABEL: constant_v4f32_to_i64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvtss2si {{.*}}(%rip), %rax
+; CHECK-NEXT:    retq
+  %r = call i64 @llvm.x86.sse.cvtss2si64(<4 x float> <float 9223372036854775808.0, float undef, float undef, float undef>)
+  ret i64 %r
+}
+
+define i64 @constant_v4f32_to_i64_round_to_zero() {
+; CHECK-LABEL: constant_v4f32_to_i64_round_to_zero:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvttss2si {{.*}}(%rip), %rax
+; CHECK-NEXT:    retq
+  %r = call i64 @llvm.x86.sse.cvttss2si64(<4 x float> <float 9223372036854775808.0, float undef, float undef, float undef>)
+  ret i64 %r
+}
+
+define <4 x i32> @constant_v4f32_to_v4i32() {
+; CHECK-LABEL: constant_v4f32_to_v4i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvtps2dq {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %r = call <4 x i32> @llvm.x86.sse2.cvtps2dq(<4 x float> <float 5.0e+09, float 5.0e+09, float 5.0e+09, float 5.0e+09>)
+  ret <4 x i32> %r
+}
+
+define <4 x i32> @constant_v4f32_to_v4i32_round_to_zero() {
+; CHECK-LABEL: constant_v4f32_to_v4i32_round_to_zero:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    cvttps2dq {{.*}}(%rip), %xmm0
+; CHECK-NEXT:    retq
+  %r = call <4 x i32> @llvm.x86.sse2.cvttps2dq(<4 x float> <float 5.0e+09, float 5.0e+09, float 5.0e+09, float 5.0e+09>)
+  ret <4 x i32> %r
+}
+
+declare i32 @llvm.x86.sse2.cvtsd2si(<2 x double>)
+declare i32 @llvm.x86.sse2.cvttsd2si(<2 x double>)
+
+declare i64 @llvm.x86.sse2.cvtsd2si64(<2 x double>)
+declare i64 @llvm.x86.sse2.cvttsd2si64(<2 x double>)
+
+declare <4 x i32> @llvm.x86.sse2.cvtpd2dq(<2 x double>)
+declare <4 x i32> @llvm.x86.sse2.cvttpd2dq(<2 x double>)
+
+declare i32 @llvm.x86.sse.cvtss2si(<4 x float>)
+declare i32 @llvm.x86.sse.cvttss2si(<4 x float>)
+
+declare i64 @llvm.x86.sse.cvtss2si64(<4 x float>)
+declare i64 @llvm.x86.sse.cvttss2si64(<4 x float>)
+
+declare <4 x i32> @llvm.x86.sse2.cvtps2dq(<4 x float>)
+declare <4 x i32> @llvm.x86.sse2.cvttps2dq(<4 x float>)
+